P0171 Diagnostic Trouble Code Discussion for June 2020
Fuel System Lean (Bank 1)
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| Help Request | Posted | |
| 2015 Chevrolet Express 3500 LS 4.8L MIL Lamp on VIN: 1GAZGZFF2F po 171 -174, ive smoked the intake a few times, no smoke, fuel pressure reads 57.8 on my snap on and autel. car on and off, ( which has me a bit confused). under load fuel trims stabilize, at idle long term at 20-25 both banks. replaced maf with ac delco a... |
June 04, 2020 | |
| 2016 Ram 2500 SLT 6.4L MIL Lamp on VIN: 3C6UR5NJ2G P0171: Lean bank one. This truck came from another shop that could not find the problem they put a mass air flow sensor on it a new map sensor on it but same results at idle the fuel trims go over 30% as soon as it comes off idle the trims drop to 0 on a road test the long term... |
June 05, 2020 |
